Perhaps you should try some spelling variations:
"50 nn decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 mean decrease" (Expand Search), "50 ns decrease" (Expand Search), "50 n decrease" (Expand Search), "59 nn decrease" (Expand Search)
"50 ng decrease" » "50 _ decrease" (Expand Search), "50 a decrease" (Expand Search), "50 we decrease" (Expand Search), "50 mg decrease" (Expand Search), "10 ng decrease" (Expand Search), "5 ng decrease" (Expand Search)
"5 wt decrease" » "5 we decrease" (Expand Search), "5 _ decrease" (Expand Search), "5 a decrease" (Expand Search), "5 ht decrease" (Expand Search)
"_ wt decrease" » "_ we decrease" (Expand Search), "_ _ decrease" (Expand Search), "_ a decrease" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("50 nn decrease") OR ((("50 ng decrease") OR ((("5 wt decrease") OR ("_ wt decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 nn decrease\") OR (((\"50 ng decrease\") OR (((\"5 wt decrease\") OR (\"_ wt decrease\"))))))".
• Removing quotes may allow a broader search: (( 50 nn decrease ) OR ((( 50 ng decrease ) OR ((( 5 wt decrease ) OR ( _ wt decrease )))))).
• Adding a wildcard symbol may retrieve word variants: (("50 nn decrease") OR ((("50 ng decrease") OR ((("5 wt decrease") OR ("_ wt decrease"))))))*.